France National Geothermal Energy Action Plan

Technology for storing CO2 in depleted gas and oil wells as part of carbon capture and storage efforts.

An underground heat pump system at Kameha Grand hotel in Germany that uses six geothermal wells at 28 meters depth to provide heating and cooling for 80,000 square feet of building space, supplying all cooling and 70 percent of heating needs while saving approximately 1,700,000 kWh annually.

Renewable energy source that experienced increased production in 2010 alongside solar and wind.

Île-de-France (suburb of Paris)